Room air conditioner



FIG. 1 is a front perspective view of a room air conditioner showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

The unshown rear face of the room air conditioner forms not part of the claimed design. 

The ornamental design for a room air conditioner, shown and described. 